Automatic two-fluid cut-off.



U. P. RUMOLD.

AUTOMATIC TWO FLUID UUT-OFF.

APPLICATION FILED MAY 20,1911

1,051,768. Patented @11.28, 1913,

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APPLICATION FILED MAY Z0, 1911.

Patented Jan. 28, 1913.

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HRISTIAN F. RUMOLD, OF BEREA, KENTUCKY.

AUTOMATIC TWO-FLUID CUT-OFF.

To all lwhom it may concern:

Be it known that I, CHRISTIAN F. RUMoLD, a citizen of the United States,residing at Berea, in the county of Madison and State of Kentucky, haveinvented new and useful Improvements in Automatic Two-Fluid Cut-Offs, ofwhich the following is a specification.

The present invention provides novel means for controlling the flow offluid through a. plurality of pipes or conductors, the mechanismembodying valves, valve gear and differential pistons and cylindersthere-Y for, the fluid being controlled in its admission to the cylinderof larger diameter by a mechanism governed in its action by varyingconditions.

The invention specifically considered is designed for use in a system ofautomatic train control for setting the brakes and cutting off thesupply of steam to the engine, the controlling mechanism being loca-tedin ythe length of the pipe by means of which the steam, or motivemedium, is supplied to the engine.

The invention consists of the novel features, details of constructionand combination of parts, which hereinafter will be more particularlyset forth, illustrated in the accompanying drawings, and pointed out inthe a pended claims.

Re erring to the drawings, forming a part of the s ecification, Figure 1is a central longitudinal section of a cut-off embodying the invention.Fig. 2 is a. horizontal section of the cut-oil'. Fig. 3 is a section onthe line w-w of Fig. 1. Fig. 4 is a section on the line 'z/-fy of Fig.1, looking in the direction of the arrows.

Corresponding and like parts are referred to in the followingdescription, and indicated in all the views ofl the drawings, by theVsame reference characters.

The numerals 1 and 2 designate two pipes, passages or conductors throughwhich the fluid such as steam, compressed air, water or the like isadapted to flow. Valves 3 and 4 are located in the length of the pipes 1and V2 in line so as to be simultaneously operated.

The valves 3 and 4 are of the type embodyl ing turning plugs. Levers 5are connected y to the turnlng plugs of the valves 3 and 4 and arejoined at their outer ends to form in effect a crank. A rod 6 isconnected at one end to the crank 5 and its opposite end is attached .toa `piston rod 7 arranged to Specification of Letters Patent.

Application filed May 20,

Patented J an. 28, 1913.

1911. Serial No. 628,487.

operate in cylinders 8 and 9 and having pistons 10 and 11 attachedthereto of different diameters. A vent pipe 12 connects with the pipe 2and is provided in its length with a valve 13, which is in line with thevalves 3 and 4 and has its stem 14 connected to or forming part of thestem of the valve 4. The fluid flows through t-he several pi es 1, 2 and12 in the direction indicated by t e arrows and when the valve 3 ismoved to interrupt communication through the pipe 1 the valve 4 is atthe same time moved to shut off the flow of the fluid through the pipe2. lVhen the valve 4 is closed the valve 13 is open and vice versa. Vhenthe tlow through the pipe 2 is cut off by means of the valve 4 the fluidinlthe pipe 2 which has passed by the valve 4 is aHorded an outletthrough the pipe 12, since the valve 13 is open, thereby relieving thepressure in that part of the pipe 2 and in the part to which said pipeis connected.

The cylinders 8 and 9 are of such diameters as to receive t-herespective pistons 10 and 11 which are arranged to operate therein. Apipe 15 connects the pipe 1 with the outer end of `the cylinder 9 and abranch pipe 1G connects said pipe 15 with the outer end of the cylinder8. It Willvthus be understood that the pressure supplied to the outerends of the cylinders 8 and 9 is the same and by reason of the increasedarea of the piston 11 the pressure of the fluid exerted on said pistonis in excess of the pressure exerted on the piston 10, hence the twopistons 10 and 11 move toward the left, thereby moving the valves 3, 4and 13 to shut ofl'the flow of fluid through the pipes 1 and 2. A ventpipe 17 leads from the outer end of the cylinder 9 and is providedy witha valve 18. The inner end of the. cylinder 9 hasa vent opening 19,thereby preventing any back pressure upon the opposing faces of thepistons 10 and 11, since the inner ends of the cylinders 8 and 9 are atall times in communication. A valve 20 is or bar 21 connects armsattached to the valves 18 and 20 so as to move both valvessimultaneously. When the valve 20 is closed the valve 18 is open andviceversa. When the valve 20 is closed the valve 18 is open to admit ofthe fluid contained in the outer end of the cylinder 9 escaping so thatthe pressure of the fluid exerted upon the piston 10 moves the latterinward, thereby located in the length of the pipe 15. A rod y zf'move inthe opposite direction.

' pipe 15 connects with the pipe 1 at ,ment of the ,pistons in onedirection.

. supply of air is cut o from the brake cylopening the valves 3 and 4. Alever 22! pivoted at 23 has one arm in engagement With the rod or bar 21, said arm being forked and having the fork members embracing the part21 and longitudinally slotted to receive the ends ot a pin QL whichprojects beyond opposite sides ot' the bar 21. A spring 25 exerts adown- 4 Ward pull upon the outer end of the lever 22. An armature 26 iscarried by the outer end of the lever 22 and is adapted to be attractedby means of an eleetio-iiiagnet 2T when the latter is energized. Thetoi-ces exerted by the parts 25 and 27 are in opposition and when theelectro-magnet is energized it attracts the armati-ire 26 and moves thelever 2,2 against the tension of the spring 25 and When theelectro-magnet 27 is .deenergized the lever 22 is moved by the spring25. When the/lever 22 is moved in one direction the lvalves 18 and 20are simultaneously moved in a given direction and when the lever 22moves in the opposite direction'said valves 18 and 2O are caused to Inthe operation of the cut-off the opening. of the valve 20 at the sametime closes the valve 18 and admits pressure into theouter end of thecylinder 9, with the result that the pistons 10 and 11 are moved to theleft, but when the valve 20 is closed and the valve 18 simultaneouslyopened the pistons 10 and l1 are moved to the right in the cylinders 8and 9. Movement of the pistonsproduces a corresponding movement of therod 6 and a turning of the valves 3,4 and 13 in the manner hereinbeforestated. lVhen the pistons occupy a vposition at the right hand end ofthe cylinders the valves 3 and 4 are open and the valve 13 closed andWhen the pistons 10 and 1l are moved to occupy a position at the lefthand end ofthe cylinders the valves 3 and 4 are closed and the valve 13opened. The pipes 15 and 16 being in communication with the pipe 1 areat all times supplied With fluid under pressure. A set screw 28 isfitted to the outer end of the larger cylinder to limit the move- Setscrews 29 are fitted to the inner end of the larger cylinder to limit'the movement of the pistons in the opposite direction.

The pipe 1 supplies steam from the boiler to theengine and whenv thevalve 3 is closed the steam is cut ofl' from the engine. The a pointbetween the valve 3 and the boiler, hence steam is supplied at boilerpressure to the pipe 15 at. all times. The pipe 2 connects the source ofcompressed air supply with the train pipe of the train of cars throughwhich air pressure is sup'iilicd to the brake cylinder. When the valve 4is closed the inde? and the istter is Vbled or relieved of the pipe 12connects with the pipe 2 at a point between the valve' land the brakecyliuder.

From the foregoing description, taken 1n lconneetioii with theacconipaiiying drawings. the advantagesot' the construction and ot' themethod of operation will be readily apparent to those skilled in the artto Whic the invention appertains, and while I have described theprinciple of operation of the invention, together with the device whichI noiv consider to be the embodiment thereof, l desire to have itunderstood that the device shoivii is merely illustrative, and that suchchanges may be made when desired as are within the scope of the claimsappended hereto.

The valves 18 and 2O and adjunctive parts may be located in any relativeposition and at any distance from thecylinders. ln some instances it maybe desirable to provide a cross-liead for the piston rod 7.

Having thus described the what is claimed as new, is

l. In a fluid cut-oil' the combination of a main pipe, two cylinders ofydifferent diameters having a tandem arrangement and provided at theirinner ends lwith a vent invention 'common to both, connected pistonsarranged to operate Within the cylinders, a branch pipe connecting themain pipe With the outer end of the larger cylinder, a second pipeconnecting the branch pipe with the outer end of the smaller cylinder, avalve in the length of the main pipe connected with the said pistons andoperated thereby, a second valve at a point in the length 0f the branchpipe between the larger cylinder and the said second pipe, a valvecontrolled vent connected With the outer end of the larger cylinder,means connecting the said .second valve with the valve of the vent forsimultaneous movement, and controlling means for automatically movingthe last mentioned valves.

2. VA fluid cut-oft' comprising alining cylinders of different diameters'having a vent at their inner ends common to both, connected pistonsarranged to operate uin the cylinders, a pipe having connection with theouter end of the larger cylinder for supplying fluid pressure thereto, avalve in the length of said pipe, a branch pipe connecting the firstmentioned pipe With the outer end of the smaller cylinder, a supply pipehaving connection with the first vmentioned pipe, a valve in the lengthof the supply pipe, a second supply pipe, a valve in the length `of saidsecond supply pipe, means for connecting the valves of the said supplypipes with the pistons, a vent pipe having connection with the saidsecond supply pipe,

valve the length of the vent pipe having connection with the valves ofthe supply pipes to open the vent when the valves o the said supplypipesare moved into closed position, a vent pipe having connection withthe outer end of the larger cylinder, a valve in the length of the lastmentioned vent pipe, means connecting the valve of the last mentionedvent pipe with the valve of the first mentioned pipe, and controllingmeans for simultaneously operating the two last mentioned valves.

3. In a fluid cut-oil the combination of dierential cylinders having avent common to both, connected pistons arranged to operate within thecylinders, a supply pipe, a branch pipe connecting the supply pipe withthe outer end of the larger cylinder, a second branch pipe connectingthe first named branch pi with the outer end of the smaller cy lnder, avalve in the length of the first mentioned branch pipe for controllingthe supply of fluid pressure to the larger cylinder, a vent pipe havingconnection with the outer end of the larger cylinder, a valve in thelength of the vent pipe, connectin means between the valves of thebranch an vent pipes, controlling means for simultaneously operating thetwo valves, a -secon supply pipe, valves in the length of the supplypipes, means connecting the valves of the supply pipes with the pistons,a vent pipe leading from the said second supply pipe, and a valve inthelength of the last mentioned vent pipe having connection with thevalves of the supply pipes to move therewith.

In testimony whereof I aix my signature in presence of two witnesses.

CHRISTIAN F. RUMOLD. Witnesses:

J oHN E CALFEE, FRANCIS O. CLARK.

